Type-matrix-forming punch



Feb. 18, 1930. I HEDLY 1,747,773

TYPE MATRIX 2 0mm runcn Filed Aug. 13, 1927 2 Sheets-Sheet 1IHIIIHHIHIHHIHIIHJi I fimwzz ar.

Feb. 18, 1930. A. H. HEDLY 1,747,773

TYPE MATRIX FORMING PUNCH Filed Aug. 15. 1927 2 Sheets-Sheet 2 a I l x.\V i A1 J2 17 252519 WZZW,

Patented Feb. 18, 1930 STATES FATE oFFIcE ARTHUR HEDLY, OF CHICAGO,ILLINOIS, ASSIGNOR TO LUDLOW TYPOGRAPH COM- PANY, OF CHICAGO, ILLINOIS,

A CORPORATION 015 ILLINOIS TYPEMATRIXFORMING PUNCH Application filedAugust 13, 1927. Serial No. 212,800.

My invention relates to the manufacture of type matrices involving theformation of the matrices by forcing into a matrix block, as for exampleof brass, a punch provided with a punch-surface conforming to the formof type face to be cast in the matrix.

The type to be'cast often present relatively narrow printing surfacessometimes of ha1rline width, requiring that the punch, for forming thematrices, in which such type are to be cast, present thin punch portionsrising from the body of the punch and of slightly converging form incross section.

As punches for such purpose have been provided hitherto the sidesurfaces of these relatively thin punch portions are plane,uninterrupted, surfaces ;-and in the use of such punches, particularlywhere the matrixblanks are 'confined'against deformation at their sideand bottom surfaces during the forming operation, it has been found thatthe metal of the matrices at the bottoms of the cavities formed by theserelatively thin punch-portions is often-times so stressed as to producecomplete fracture of the matrices along conver ing lines resulting inthe separation therefrom of wedge-shaped bodies at said portions andrendering the matrices unfit for use.

My object is to overcome this difliculty which is accomplished inaccordance with my invention by providing these relatively thinpunch-portions with stepped or shouldered, side surfaces where theypenetrate the matrix blanks in the forming operation, resulting in sodistributing the stresses on the matrix blanks that the metal remainsunfractured,

and smooth, enduring cavity-bottom surfaces result.

Referring to the accompanying drawings: Figure 1 is an enlarged faceview of a punch-member which may be employed in utilizing my invention.Figure 2 is a sectional view of the punch-member, the section beingtaken at line 2 on Fig. 1 and viewed in the direction of the arrow. Fig.3 is a broken sectional view of the matrix formed from the punch. Figure4 is a broken plan view of matrix-blank holding mechanism which may beused for holding the blank during the punching operation; and Figure 5,a section taken at the irregular line 55 on Figure 4 and viewed in thedirection of the arrows.

I have chosen to illustrate my invention, by way of example, inconnection with a punch for producing a matrix in which a capital letterWV is to be cast, the letter being formed of relatively wide-lineportions and relatively narrow, hair-line, portions. The punch to formthe matrix-cavity in which type presenting a printing-face conforming tosuch a letter is to be formed, is represented at 5 and is formed with amatrixblanlcpenertating portion the terminal face of which conforms inoutline to the outline ofthe letter to be cast in thematrix formed bythe punch. Thus the terminal face of the punch presents the relativelywide portions and the relative thin portions 6 and 7 correspondingrespectively with the wide and thin lines of the letter referred to.

, The metal ribs represented at 8 and rising from the body of the punchand presenting. the; relatively wide terminal faces 6 are of wedge-shapein cross-section with their side surfaces plane, uninterrupted, surfacesas is common practice in punches of this general character. The ribsrepresented at 9 and rising from the body of the punch and presentingthe relatively narrow terminal faces 7 are of general wedge-shape incross-section. but

their side surfaces, instead of being plane, uninterrupted, surfaces asin the case of the ribs, arestepped between the terminal faces thereofand the body of the punch to present laterally-extending shoulders, orsteps, 10 which, following the initial operation of forcing the punchinto thematrix-blank, the latter being confined against lateraldeformation at its side and bottom surfaces in any desirableway, engagethe matrix-blank and in con tinuingthe forming operation act against,and deform, the metal of the blank, within the confines of its sideandbottom surfaces, with the result that the metal in which thetype-forming mold-cavity is formed remains unfractured and aperfectly-formed, enduring matrix is produced.

In Figs. 4 and 5 I have shown means which may be utilized for holdingthe matrix-blank while being punched and which serve to hold the bankagainst free lateral and downward flow of the metal thereof during thepenetration of the punch. The means shown are of the constructiondisclosed in my United States Letters Patent No. 1,237,643, dated August21, 1917, so that a brief description only thereof will sufiice.

The mechanism shown comprises a bed 11 superposed by a block 12 rigidlysecured thereto as by screws, this block having one corner thereofrecessed as represented at 13, the walls of this recess and representedat 14; and 15 extending at a right angle to each other and being linedwith bars 16 and 17, the block 12, lined as stated, constituting one jawof a chuck in which the matrix-blank is to be held. The other jaw ofthis chuck, represented at 18 and formed with an apex portion 19,

is guidingly confined at its outer end in parallel guides 20, sodisposed that the jaw is movable from the closed position shown in Fig.4 into open position, and vice versa.

The extreme apex portion 19 of the jaw 18 contains .a recess 21, theside wall 22 of which is parallel wtih the inner face of the plate 16,the recess 21 containing a block 22 held in place by a screw device 23,the outer face 24 of the block 22 being parallel with the inner face ofthe plate 17. There is'thus provided between the plates 16 and 17, thewall 22 and face 24 of the block 22, a recess 25 in which thematrix-blank, represented at 26, is located.

The bottom of the blank 26 rests upon a rigid foundation which, in thecase of the particular machine shown is a hardened steel plate 27carried on the upper face of a matrix ejector 28 slidably mounted in thebed 11 of the machine, this ejector, in the operation of punching thematrix blank extending into the position shown in Fig. 5.

In the operation of the mechanism shown the jaw 18 is withdrawn from theposition shown in Fig; 4 to permit of the introduction of the blank 26into the recess 25 and the jaw 18 thereupon forced inwardly to theposition shown in Fig. 4 by any suitable mechanism, as for example bythe pneumatic mechanism shown in said Letters Patent, to firmly clampthe blank 26, the side walls of the recess 25 and the portion of themachine upon which the blank rests serving to prevent free lateral anddownward, flow of the metal of the matrix-blank in the operation offorcing the punch 5 into it to form the mold cavity.

What I claim as new and desire to secure by Letters Patent is:

1. The art of forming matrices which consists in forcing into the blankfrom which the matrix is to be formed and of such metal that fracturethereof occurs in the matrixforming operation, at the bottoms of therelatively narrow matrix-cavities thereof, a punch having a relativelythin characterforming portion on its face the side surfaces of which areof stepped form providing laterally-extending shoulder-portions.

2. The art of forming matrices which consists in forcing into the blankfrom which the matrix is to be formed and of such metal that fracturethereof occurs, in the matrix-forming operation, at the bottoms of therelatively narrow matrix-cavities thereof, a punch having a relativelythin character-forming portion on its face the side surfaces of whichare of stepped form providing laterally-extending shoulder-portions andpresenting die portions for forming all of the matrixcavities, therebysimultaneously forming all of said cavities.

3. The art of forming matrices which consists in forcing into the blankfrom which the matrix is to be formed and while confining the blankagainst free downward and lateral flow of the metal thereof, a punchhaving a relatively thin character-forming portion on its face the sidesurfaces of which are of stepped form providing laterally-extendingshoulder-portions.

4. The art of forming matrices which consists in forcing into the blankfrom which the matrix is to be formed and while confining the blankagainst free downward and lateral flow of the metal thereof, a punchhaving a relatively thin,character-forming portion on its face the sidesurfaces of which are of stepped form providing laterally-extendingshoulder-portions and presenting die portions for forming all of the marix-cavities, there by simultaneously forming all of saidmatrixcavities.

ARTHUR H. HEDLY.

